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历史数据信息结构体。
struct{
DWORD dwSize;
BYTE byMajorType;
BYTE byMinorType;
BYTE byRes1[2];
NET_DVR_TIME struStartTime;
NET_DVR_TIME struStopTime;
BYTE byChanType;
BYTE byRes2[3];
DWORD dwChanNo;
DWORD dwSubChanNo;
DWORD dwVariableNo;
DWORD dwPointNo;
BYTE byRes3[32];
}NET_DVR_SEARCH_CONDITION, *LPNET_DVR_SEARCH_CONDITION;